package com.ly.hotel.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import android.util.Log;

public class HttpDownloader {
	private URL url = null;

	/**
	 * 根据URL下载文件,前提是这个文件当中的内容是文本,函数的返回值就是文本当中的内容 1.创建一个URL对象
	 * 2.通过URL对象,创建一个HttpURLConnection对象 3.得到InputStream 4.从InputStream当中读取数据
	 * 
	 * @param urlStr
	 * @return
	 */
	public String download(String urlStr) {
		StringBuffer sb = new StringBuffer();
		String line = null;
		BufferedReader buffer = null;
		try {
			url = new URL(urlStr);
			HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
			buffer = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
			while ((line = buffer.readLine()) != null) {
				sb.append(line);
			}

		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				buffer.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return sb.toString();
	}

	public String downloadOrg(String urlStr) {
		StringBuffer sb = new StringBuffer();
		String line = null;
		BufferedReader buffer = null;
		try {
			url = new URL(urlStr);
			HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
			buffer = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
			while ((line = buffer.readLine()) != null) {
				sb.append(line + "%5cn");
			}

		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				if(buffer != null){
					buffer.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return sb.toString();
	}

	/**
	 * 
	 * @param urlStr
	 * @param path
	 * @param fileName
	 * @return -1:文件下载出错 0:文件下载成功 1:文件已经存在
	 */
	public int downFile(String urlStr, String path, String fileName, int offset) {
		Log.i("interface", urlStr);
		Log.i("interface", path);
		Log.i("interface", fileName);
		
		InputStream inputStream = null;
		try {
			FileUtils fileUtils = new FileUtils();

			if (fileUtils.isFileExist(path + fileName)) {
				Log.i("interface", path + fileName + "文件存在，删除之");
				FileUtils.deleteFile(new File(path + fileName));
			}

			inputStream = getInputStreamFromURL(urlStr);
			File resultFile = fileUtils.writeInterface2LocalFromInput(path, fileName, inputStream, offset);
			if (resultFile == null) {
				Log.i("interface", "resultFile == null");
				if (inputStream != null) {
					inputStream.close();
				}
				return -1;
			}


		} catch (Exception e) {
			e.printStackTrace();
			Log.i("interface", "Exception");
			if (inputStream != null) {
				try {
					inputStream.close();
				} catch (IOException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
			}
			return -1;
		}
		
		return 0;
	}

	/**
	 * 根据URL得到输入流
	 * 
	 * @param urlStr
	 * @return
	 */
	public InputStream getInputStreamFromURL(String urlStr) {
		HttpURLConnection urlConn = null;
		InputStream inputStream = null;
		try {
			url = new URL(urlStr);
			urlConn = (HttpURLConnection) url.openConnection();
			inputStream = urlConn.getInputStream();

		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}

		return inputStream;
	}
}
